MB39A119 Datasheet, PDF (4/53 Pages) Fujitsu Component Limited. – DC/DC Converter IC of Synchronous Rectification for charging Li-ion battery

MB39A119
■ PIN DESCRIPTION
Pin No.
1
2
3
4
Pin Name
VCC
−INC1
+ INC1
ACIN
5
ACOK
6
CVM
7
+ INE1
8
−INE1
9
OUTC2
10
+ INC2
11
−INC2
12
+ INE2
13
− INE2
14
FB123
15
−INE3
16
OUTD
17
CS
18
RT
19
VREF
20
GND
21
CTL
22
XACOK
23
PGND
24
OUT-2
25
VB
26
VS
27
OUT-1
28
CB
I/O
Description
⎯ Power supply terminal for reference voltage and control circuit.
I Input current detection amplifier (Current Amp1) input terminal.
I Input current detection amplifier (Current Amp1) input terminal.
I AC adapter voltage detection block (AC Comp.) input terminal.
AC adapter voltage detection block (AC Comp.) output terminal.
O ACOK = L when ACIN = H, ACOK = Hi-Z when ACIN = L,
ACOK = Hi-Z when CTL = L
O Constant voltage control state detection block (CV Comp.) output terminal.
I Error amplifier (Error Amp1) non-inverted input terminal.
I Error amplifier (Error Amp1) inverted input terminal.
O Charge current detection amplifier (Current Amp2) output terminal.
I Charge current detection amplifier (Current Amp2) input terminal.
I
Charge current detection amplifier (Current Amp2) and low input voltage
detection comparator (UV Comp.) input terminal.
I Error amplifier (Error Amp2) non-inverted input terminal.
I Error amplifier (Error Amp2) inverted input terminal.
O Error amplifier (Error Amp1, 2, 3) output terminal.
I Error amplifier (Error Amp3) inverted input terminal.
This terminal is set to Hi-Z to prevent loss of current through the output
O
voltage setting resistor when IC is standby mode.
OUTD = Hi-Z when CTL = L
OUTD = L when CTL = H
⎯ Soft-start capacitor connection terminal.
⎯ Triangular wave oscillation frequency setting resistor connection terminal.
O Reference voltage output terminal.
⎯ Ground terminal.
I Power supply control terminal for DC/DC converter block.
AC adapter voltage detection block (AC Comp.) output terminal.
O XACOK = Hi-Z when ACIN = H, XACOK = L when ACIN = L,
XACOK = Hi-Z when CTL = L
⎯ Ground terminal.
O External synchronous rectification side FET gate drive output terminal.
O Bias output terminal for output circuit.
⎯ External main side FET source conneciton terminal.
O External main side FET gate drive output terminal.
⎯
Boot strap capacitor connection terminal.
The capacitor is connected between the CB terminal and the VS terminal.
4